For ride photos: I've had bands work for many years and bands that didn't work after several months. All the features where you touch the band to something (tickets, fastpass, photographers, meal plan, charging to room, etc) will work unless the band gets damaged, that part of the band requires no battery to function. It's the ride photos that link automatically that might not work and the only way to know if it stops working is to ride something and not have the photo show up.